Numerical Simulation of Shielding Performance of Different Aggregate Concrete

Abstract

The shielding properties of different energy (1MeV, 2MeV, 3MeV) γ-rays were studied for the concrete with magnetite, magnetite ore, barite, barite ore, steel ball, ordinary sand and crushed stone as aggregates. Based on MCNP5 program, the shielding performance of different aggregate concrete was simulated and analyzed, and the attenuation coefficients, transmittance and transmission spectrum of the three-rays concrete through different aggregate concrete were obtained. Research indicates：For the same energy γ-rays, the shielding effect of concrete with steel ball, magnetite ore and magnetite as the aggregate is the best, and the shielding effect of the concrete decreases with the increase of γ-rays energy. And the transmittance of γ-rays of the same aggregate concrete is different; when γ-rays energy is higher than 1.02MeV, from the transmission spectrum can be seen, γ-rays and concrete electron-pair effect and the Compton effect probability increases